I was driving a 2015 Prius, recently, when it went from 0-20 mph normally. Stepping on the gas pedal lightly to accelerate the car from 20-30mph appears a small creaking sound under the car, above 30mph the car runs smoothly normally. Please tell me what is wrong with my car?
Well creaking is generally not descript of head gasket . Look more for a bucking kinda feel.. creaking and groaning descriptions are usually something to do with suspension I've noticed.
Check to see that the "stick" that holds the hood open is secured in it's clip. Mine has weakened and if I shut the hood too hard the stick will fall loose and lay on the engine. It makes a small rattle as you say when gently accelerating. I don't think it would hurt anything but now that I recognize the rattle, I can replace it and close the hood a bit more gently.
